Home / Standards / GB/T 31004.3-2014 GB/T 31004.3-2014 Active Acoustics―Measurement of sound insulation in buildings and of building elements using sound intensity―Part 3: Laboratory measurements at low frequencies 声学 建筑和建筑构件隔声声强法测量 第3部分：低频段的实验室测量 Standard Type GBT ICS 17.140 CCS A59 Status 现行 Issue Date 2014-09-03 Implementation 2015-02-01 Responsible Dept 中国科学院 Drafting Unit N/A